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昨天开始下雨时，爸爸正在看电视。
Dad was watching TV when it began to rain yesterday.
youdao
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当我们到达机场时，天开始下雨了。
It started raining when we got to the airport.
youdao
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我们正要出发，这时天开始下雨了。
We were about to start when it began to rain.
youdao
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快到早晨的时候天开始下雨了。
It began to rain toward morning.
youdao
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下午晚些时候，天开始下雨了。
Late in the afternoon, it began to rain.
youdao
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我们正要出发，这时天开始下雨了。
We were to start out when it began to rain.
youdao
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我正要外出时，天开始下雨了。
It started to rain when I was going out.
youdao
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我正要出门，突然这时天开始下雨。
I was just about to go out when suddenly it began to rain.
youdao
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当我们回到家时，天开始下雨。
It started to rain as soon as we got home.
youdao
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当他们离开车站时天开始下雨了。
It was raining when they left the bus station.
youdao
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我醒的时候，老天开始下雨了。
When I woke up, it began to rain.
youdao
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他刚要出门时，天开始下雨了。
He was about to leave when it began to rain.
youdao
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我很吃惊地发现天开始下雨了。
I was so surprised to find that it had started to rain.
youdao
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当他出去的时候，天开始下雨了。
As he was going out, it began to rain.
youdao
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我们正准备离开，天开始下雨了。
We were about to leave when it began to rain.
youdao
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咱们正准备脱离，天开始下雨了。
We were about to leave when it began to rain.
youdao
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我们就要出去，突然老天开始下雨了。
We were about to go out when it started to rain.
youdao
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我们正在外边玩，这时天开始下雨了。
We were playing outside when it began to rain.
youdao
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我正要出发，就在这时天开始下雨了。
I was about to start out when it began to rain.
youdao
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我们正在上英语课，突然天开始下雨。
We were having an English class when it began to rain.
youdao
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天开始下雨时他用一张报纸盖在头顶。
When it began to rain he covered his head with a newspaper.
youdao
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当天开始下雨时我正在睡觉。
I was sleeping when it started to rain.
youdao
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外面很暗，而糟糕的是，天开始下雨了。
It was very dark outside, and what was worse, it began to rain.
youdao
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当我们正在看篮球比赛，天开始下雨了。
We are watching the basketball game when it begins to rain.
youdao
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天开始下雨后他们才回家。
They did not return home till it began to rain.
youdao
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那些登山者到达山顶时，天开始下雨了。
It began to rain when the climbers reached the top of the mountain.
youdao
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但是我又点不著火，因为天开始下雨了。
But I wouldn't be able to light the fire as the rain just fell.
youdao
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正午时分天开始下雨了。
At noon it started to rain.
youdao
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我一直呆到太阳下山，那时天开始下雨了。
I stayed till sunset, when it began to rain.
youdao
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我一直呆到太阳下山，那时天开始下雨了。
I stayed till sunset, when it began to rain.
youdao